Recording method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing ink jet recording methods face challenges in achieving excellent image quality and scratch resistance when using multiple inks with different reactivities, as components may not fully react with the reaction liquid, leading to deterioration in image quality and scratch resistance.
Innovation Solution
A recording method where the second ink composition with lower reactivity is adhered to the recording medium before the first ink composition, ensuring both react sufficiently with the reaction liquid, and the use of resin microparticles and specific organic solvents to improve image quality and scratch resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple inks with different reactivities are used in the recording method, then the image quality and scratch resistance deteriorate because components may not fully react with the reaction liquid, but using a single ink type limits the color range and design flexibility
Solution Approach 1:
The patent applies preliminary action by adhering the second ink composition (with lower reactivity) to the recording medium before adhering the first ink composition (with higher reactivity). This sequential arrangement ensures that the less reactive components have adequate time to react with the reaction liquid before the more reactive components are introduced, thereby achieving sufficient reaction for both ink types and improving image quality and scratch resistance while maintaining the ability to use multiple ink compositions
2Manufacturing precision
If the first ink composition (high reactivity) is adhered first, then the reaction occurs too quickly causing poor image quality, but adhering it second ensures proper reaction timing
Solution Approach 1:
The patent implements preliminary action by pre-adhering the second ink composition (lower reactivity) to the recording medium before adhering the first ink composition (higher reactivity). This sequencing allows the less reactive components to begin their reaction with the reaction liquid first, providing better control over the reaction process and preventing premature or excessive reaction that would degrade image quality, while still maintaining efficient recording speeds
3Manufacturing precision
If aqueous ink composition is used on low ink-absorbency recording medium, then image quality improves through early phase fixing with reaction liquid, but scratch resistance deteriorates when multiple inks with different reactivities are used
Solution Approach 1:
The patent applies preliminary action by adhering the second ink composition (with lower reactivity) to the recording medium before adhering the first ink composition (with higher reactivity). This sequential arrangement ensures that both ink compositions have adequate opportunity to react with the reaction liquid, achieving sufficient reaction for both types. As a result, the recorded material attains both excellent image quality and improved scratch resistance, even when using multiple aqueous ink compositions with different reactivities on low ink-absorbency recording media
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach results in recorded materials with enhanced image quality and scratch resistance, even when using deep and light color inks with different colorant amounts, by ensuring sufficient reaction with the reaction liquid and forming a smooth film.
Implementation Method 1
adhering a reaction liquid which reacts with and aggregates components of an ink composition to a recording medium
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A recording method according to the invention includes adhering a reaction liquid which reacts with and aggregates components of an ink composition to a recording medium; adhering a first ink composition to the recording medium; and adhering a second ink composition having reactivity with the reaction liquid lower than that of the first ink composition to the recording medium. Adhesion of the second ink composition to the recording medium is performed prior to adhesion of the first ink composition to the recording medium.